topicCeramide Supplementation Wrinkle Reduction Randomized Trial
claim12 Methodological quality was assessed using the Cochrane Risk of Bias 2 (RoB 2) tool for randomized trials [].
evidence level1
citationNezhadpour Amin Shehni (2026)
sourceOral Probiotics for Improving Skin Hydration, Elasticity, Transepidermal Water Loss, and Wrinkle Reduction in Adults: A Systematic Review and Meta‐Analysis of Randomized Controlled Trials
topicCeramide Supplementation Wrinkle Reduction Randomized Trial
claimTwo reviewers independently evaluated five domains: (1) bias arising from the randomization process, (2) bias due to deviations from intended interventions, (3) bias due to missing outcome data, (4) bias in measurement of the outcome, and (5) bias in selection of the reported result.
evidence level1
citationNezhadpour Amin Shehni (2026)
sourceOral Probiotics for Improving Skin Hydration, Elasticity, Transepidermal Water Loss, and Wrinkle Reduction in Adults: A Systematic Review and Meta‐Analysis of Randomized Controlled Trials
topicCeramide Supplementation Wrinkle Reduction Randomized Trial
claimEach domain was rated as “Low risk,” “Some concerns,” or “High risk,” with an overall risk of bias judgment derived per study.
evidence level1
citationNezhadpour Amin Shehni (2026)
sourceOral Probiotics for Improving Skin Hydration, Elasticity, Transepidermal Water Loss, and Wrinkle Reduction in Adults: A Systematic Review and Meta‐Analysis of Randomized Controlled Trials
topicCeramide Supplementation Wrinkle Reduction Randomized Trial
claim1 2 3 The human skin, as the largest organ and first line of defense against environmental stressors, is increasingly recognized as an endpoint influenced by systemic factors, including the gut microbiome [].
evidence level1
citationNezhadpour Amin Shehni (2026)
sourceOral Probiotics for Improving Skin Hydration, Elasticity, Transepidermal Water Loss, and Wrinkle Reduction in Adults: A Systematic Review and Meta‐Analysis of Randomized Controlled Trials
topicCeramide Supplementation Wrinkle Reduction Randomized Trial
claimImpact of Oral Herbal Supplementation on Human Skin Aging: A Systematic Review of Clinical Trials
evidence level1
citationSanjaya G (2026)
sourceImpact of Oral Herbal Supplementation on Human Skin Aging: A Systematic Review of Clinical Trials